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DS90UB948-Q1: quickly test for mass production

Lawrence He
Genius 3115 points
Part Number: DS90UB948-Q1

Hi, Support Team

Do we have quickly test for mass production of document?

have any way to do?

if any suggestion, Please advise me.

Thanks,

Best regards,

Lawrence

  • 0
    TI__Mastermind 18046 points

    Hi Lawrence, 

    What are you trying to test? Is this a system with the 948 integrated into the display? Is there a partnering serializer that you are using or just the deserializer side? Are you looking for something like a pattern generator test? I am not too clear on the requirements so if you can help provide some more details, that would help me with the recommendations. 

    Best,

    Shu

  • 0 in reply to Shu Huang
    Genius 3115 points

    Hi, Shu

    as far as production line test, we know BIST function as a way to validate the channel link is error free.

    but our client need test eye diagram during mass production, its make sense?

    based on your experience, how long does eye diagram testing take? 1h? 2h?

    if any suggestion, Please advise me.

    Thanks,

    Best regards,

    Lawrence

  • +1 in reply to Lawrence He
    TI__Mastermind 18046 points

    Hi Lawrence, 

    On the 948, the best method to test link margins would be through our MAP (Margin Analysis Program). The CMLOut pins can be used to monitor the eye however, it must be understood that this does not give any information on the actual received signal jitter or the magnitude of the received signal since the signal is observed after it goes through a CML driver which limits the signal. MAP tool provides more holistic information about the overall quality of the system since MAP tool acts after CDR loop. So if there are issues with the Clock and Data Recovery loop due to excessive Clock jitter or due to excessive data jitter, MAP tool can provide the right amount of information. 

    Below is an Users Guide to the MAP Tool. Hope this helps. 

    https://www.ti.com/lit/ug/snlu243/snlu243.pdf?ts=1699555309183&ref_url=https%253A%252F%252Fwww.google.com%252F

    Best,

    Shu